Need help on females

So i have 7 plants total going right now. 5 AK47 2 Power Skunk. They are currently under a 400w light on 18/6 but i wanna know which ones are my females so i can stick them into my mother room.

So how would i go about doing this? Do you recommend i flower them for a couple of days then put them back into veg? How long does it take for the hairs to show? Is it possible to flower on my MH or should i use my HPS then go back to my MH when i figure out which ones are my females?

Thanks advice appreciated. I'm hoping this grow comes out well considering it is my first...

might be faster to take a clone from each and flower the clone. they can take quite awhile to start vegitative growth again once theyve entered a flower cycle.

ahh thats going to be a hassle... but w.e maybe ill try... can i flower them on a mh?

another thing you can do is just flower the bottom portion of the plant. Use somehting light proof but breatheable, like a paper bag, to separate the bottom of the plant from the top, and just keep taking the bag on and off to simulate 12/12 lights. Its a hassle I know, but atleast you don't have to clone.

OR

just wait it out